Rotatable dice



F. W.- SIEGEL, F. J. BOYLE AND J. M. SIPP.

ROTATABLE DICE. APPLICATION FILED MAY5,1920.

Patented Apr. 12, 1921.

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UNITED A STATES- PATENT orricl-z,

O1 NEWARK,-FREDERICK J. BOYLE, O13 HARRISON, AND JOHN V M. 51191, OF NEWARK, NEW JERSEY.

BOTATABLE DICE.

' To all whom it may concern:

Be it known that we, FREDERICK W. SIEGEL, a citizen of the United States, residing at No. 41 Roseville avenue, Newark, county of Essex, and State of New J ersey, FREDERICK J. BOYLE, a citizen of the United States, residing at No. 103 South Fourth street, Harrison, county of Hudson, and State of New Jersey, and JoHN M. SIPP a citizen of the United States, residing at llo. 431Merchant street, Newark, count of Essex, and State of New Jersey, have invented certain new and Rotatable Dice, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention comprises a pair of. dice mounted upon a rotatable stem and having their peripheries of the same diameter an of the same poly onal form.

In the drawing, igure 1 is a perspective view of the implement, and Fig. 2 a vertical section at its center line.

The. stem A is formed with a spinning point C at one end and has one of the dice fixed rigidl to the stem next the point, such die being therefore rotated whenthe stem is spun, its momentum maintaining the rotation of the stem when it is released fromthe fingers. 1 I

The other die D is fitted rotatably upon the stem above the fixed die with a narrow collar F between the two dice to reduce their frictional contact.

A shoulder E is formed upon the stem above the rotatable die to hold it in proximity to the fixed die.

The dice have polygonal peripheries of the same size and contour; the drawing showing'them of hexagonal form which furnishes six flat sides die.

These six flat sidesfurnish spaces for inscribing upon each of the rotary dice the same six numbers that are six sides ofcubical dice.

The numbers on the edge of each die may therefore be the same as those upon the six sides of cubical dice, and they are disposed in a special-opposition so that although they are all upon the edge of the die thelnumbers l, 2 and 3 are opposite to the numbers 6, 5 and4, as is common with cubical dice,

dice can be counted and the useful Improvements in sides to likewise coincide.

upon the edge of each i found I upon the Specification of Letters Patent. Patented Apr. 12, 1921. Application filed May 5, 1920. Serial No. 379,000.

When this game implement lies upon its side, the upper number upon each of the number directly below it if desired, whichis known without turning over the implement as the sum of the upper and lower numbers which is always equal to 7.

These rotatable dice are therefore a full equivalent tothe cubical dice, although their shape is different and the disposition of the spaces on which numbers are inscribed which are all in a continuous row instead of upon faces at right angles to one another. The bodies of the two dice being of the same size and having the same number of flat sides, it is found that when the implement falls down after spinning its contact with the table forces two of the flat sides into coincidence, which causes all the other The rotatable die in such case is turned by the weight of the fixed die when the latter falls upon the table, so that the sides of the two dice coincide.

This improved game implement has an advantage over the loose dice, which are commonly thrown two at a time before the numbers are counted, as the improved dice" can not be scattered orrolled ofl'intoa corner, as often happens with loose dice; and furthermore, they do not require any dice-box, which often occupies space'inconveniently, as within the sides of a backgammon board in which dice are used. We do not claim the mere mounting of a construction and arrangement 0 the two dice, one being attached to the stem to assist its spinning momentum. l-Iaving thus set forth the nature of the invention what is claimedherein is:

1. A game implement used by spinning, comprising a central stem with spinnin point at one end, a numbered die attach rigidly to the stem, and a die mounted rotatably upon the stem so as to be turned b the fixed die when the implement fal s down. v' i 2. A game implement having a central stem with spinning point at one end, a numbered die attached rigidly to the stem next r A stem with spinning point at one end, a numbered die attached rigidly to the stem next.

the oint, a shoulder upon the stem above the ed die, and a rotatable die fitted to turn upon the stem between the lower die and the shoulder.

4.- A game implement comprising a, central stem with spinning point at one end,

a. numbered die attached rigidly to the stem,

and a die mounted rotatably upon the stem with a narrow collar between the two dice to diminish their frictional contact.

5. A game implement constructed as de-' nemeee 

